Please use this identifier to cite or link to this item: https://doi.org/10.1016/j.watres.2014.03.007
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dc.titleResponse surface modeling of Carbamazepine (CBZ) removal by Graphene-P25 nanocomposites/UVA process using central composite design
dc.contributor.authorAmalraj Appavoo, I.
dc.contributor.authorHu, J.
dc.contributor.authorHuang, Y.
dc.contributor.authorLi, S.F.Y.
dc.contributor.authorOng, S.L.
dc.date.accessioned2014-10-09T07:39:01Z
dc.date.available2014-10-09T07:39:01Z
dc.date.issued2014-06-15
dc.identifier.citationAmalraj Appavoo, I., Hu, J., Huang, Y., Li, S.F.Y., Ong, S.L. (2014-06-15). Response surface modeling of Carbamazepine (CBZ) removal by Graphene-P25 nanocomposites/UVA process using central composite design. Water Research 57 : 270-279. ScholarBank@NUS Repository. https://doi.org/10.1016/j.watres.2014.03.007
dc.identifier.issn18792448
dc.identifier.urihttp://scholarbank.nus.edu.sg/handle/10635/91184
dc.description.abstractGraphene-P25 (Gr-P25) nanocomposites were synthesized by a simple microwave hydrothermal method. The nanocomposites with different graphene loading were evaluated for the degradation of an important pharmaceutical water pollutant, Carbamazepine (CBZ) under UVA irradiation in a batch reactor. Response surface methodology (RSM) was used to optimize three key independent operating parameters, namely Gr-P25 nanocomposites dose (X1), CBZ initial concentration (X2) and UV light intensity (X3), for photocatalytic degradation of CBZ. The central composite design (CCD) consisting of 20 experiments determined by 23 full factorial designs with six axial points and six center points was used to conduct experiments. The results showed that CBZ removal was significantly affected by the synergistic effect of linear term of Gr-P25 dose (X1) and UV intensity (X3). However, the quadratic terms of Gr-P25 (X12) and UV intensity (X32) had an antagonistic effect on CBZ removal. The obtained RSM model (R2=0.9206) showed a satisfactory correlation between experimental and predicted values of CBZ removal. The optimized conditions for achieving 100% CBZ removal with 5min UVA irradiation were 25.14mg/L, 167.68ppb and 1.35mW/cm2 for Gr-P25 dose, initial concentration of CBZ and UV intensity, respectively. © 2014 Elsevier Ltd.
dc.description.urihttp://libproxy1.nus.edu.sg/login?url=http://dx.doi.org/10.1016/j.watres.2014.03.007
dc.sourceScopus
dc.subjectGraphene oxide
dc.subjectHeterogeneous photocatalysis
dc.subjectP25
dc.subjectPharmaceutical degradation
dc.subjectResponse surface methodology
dc.typeArticle
dc.contributor.departmentCIVIL & ENVIRONMENTAL ENGINEERING
dc.contributor.departmentCHEMISTRY
dc.description.doi10.1016/j.watres.2014.03.007
dc.description.sourcetitleWater Research
dc.description.volume57
dc.description.page270-279
dc.description.codenWATRA
dc.identifier.isiut000337261400026
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